Index tab



-June 6, 1933. G. c. PERRY 1,912,792

INDEX TAB Filed Jan. '7, 1932 Patented June 6, I1933 onovnn c. runny, oremanan, ILLINOIS mnnx :un

Application ied January 7, 1 932. Seria! No. 535,228.

The present invention relates to celluloid articles such as index tabs,label holders, and the like, 'provernents by 1which the utility oi sucharticles is considerably enhanced.

While my invention will 'be understood to have general application, itwill be described with particular respect 'to a preferred embodiment,namely, index tabs or filing guides.

Heretofore the. attaching portion of celluloid articles such as indextabs employing; re-

` moistening glue has generally comprised lli cloth, due to theimpossibility of providing an adequate union between celluloid and glue.To secure celluloid tabs to ledger sheets, guides, and cards, forexample., it has been necessary to resort to celluloid solvents, heatand pressure.

A principal object of the present invention is to provide celluloidarticles such as index tabs and label holders having celluloid attachingportions capable of forming a stable union with remoistening glue.

Another object is to provide an index tab having transparent attachingportions.

Still another object is the construction of an index tab having stoppingor alignment l means which does not prevent the tab from being fullyopened, for example, for remoistening the glue.

These and other objects will be apparent from the following descriptionof a preferred form of my invention. Y

Fig. 1 is a side Vview of a tab embodying the features of my invention;

Fig. 2 is an end view of the tab shown in Fig. 1; and Y Fig. 3 is a sideview showing a tab having transparent attaching portions secured to asheet of paper having printing beneath the attaching portion.

The tab shown Vin the drawing comprises substantially parallelprojecting -side portions 10 and 11 joined together along one 5information, In certain cases only one of edge by a spacing strip 12.Preferably these side portions are transparent celluloid forma windowchannel which is adapted to receive a label insert containingappropriate and has particular reference to im' the side portions needbe transparent, and in other instances it may be desirable to providecolored side portions.

Celluloid spacing strip -12 is preferably secured to the inner faces ofthe side portions as described in Patent, No. 1,510,243, issued to meSeptember 30, 1924. 'lhat' is, the parts are assembled in their finalposition and a brush coated with a celluloid solvent is passed incontact with the outer surfaces, whereby the celluloid solvent passesbetween the side portions and the spacing strip to form an intimateunion. By employing appropriate colors these spacing strips may be usedfor signal purposes.

To the open edges of sides 10 and 11 are joined attaching portions 13and 14, respectively. rdinarily, the attaelfn'uagI portions will bejoined to the inner faces of the sides as shown at 15 and 16 in Fig. 2,the joints being made permanent by welding with a celluloid solventor'cement.

Attaching portion 14 extends beyond portion 13 to facilitate insertionof a sheet to which it is desired to secure the tab. The upper edge ofportion 14. may be turned over to form a hook 17. Being made ofcelluloid,

which has considerable stiffness, this hook will retain its shape, wherepaper or cloth would not. This structure is of considerable utilitysince it forms a stop for sheets inserted between the attachingportions, thereby permitting the alignment of tabs in a uniform andsatisfactory manner, and insures that the projecting sides or windowportions will remain visible subsequent to attachment of the tab to asheet. In addition, the member 17 is of particular utility incombination with my new celluloid attaching portions. AMorespecifically, this type of stop member permits the tab to be fullyopened so that the inner faces of the attaching portions may be easilymoistened 'without stress or strain. The attaching portions are composedof ce1- lulod and are consequently-less flexible than the clothattaching portions ofthe prior art.

In the prior art many attempts have been made to solve the problem ofattaching a water soluble or remoisteningglue to celluloid,

but prior to my invention such eorts were without material success.Natural gums, pastes and glues do not adhere to Celluloid as to paper,cloth, and the like. Apparently, this is due to the non-porous characterof the Celluloid, and also to the lack of surface or specific adhesionbetween the molecules of glue and those of Celluloid. Attempts have beenmade to dilute glue with a Celluloid solvent, but the results of thisprocedure are unsatisfactory.

ln accordance with my invention, the cel. luloid forming the attachingportion of the tab is coated with a solution similar to that employed inthe so-Called subbing process of the photographic art. This solution mayConform approximately to the following formula: l

treated with such a solution has dried, it affords an excellent base fora remoistening glue, whereby the Celluloid may be employed,

for direct attachment to paper and the like. rl`hus, index tabs andother Celluloid articles having transparent attaching portions may bemade of the material.

When the volatile portions of the above solution have evaporated, thesurface of the Celluloid is provided with a firmly held coating of aglue adherent substance. An ordinary remoistening or Water soluble glueis then applied to the Celluloid at the portion having the glue adherentsubstance, and after drying the Celluloid is ready for use. Thisoperation -is preferably done with sheets of Celluloid before the sheetshave been formed into the desired article.

From the foregoing description, it is seen lthat in accordance with myinvention l prol vide a tab with Celluloid fastening portions having allthe utility of the ordinary Cloth attaching portions. Also the tab maybe attached to a sheet havin printed matter ad# jacent the edges thereowithout ren'dering such matter illegible. The transparency of theattaching portion permits printed matter, marks, and the like to bereadily observed therethrough, as shown in Fig. 3.

It is to be understood that the above description of a preferredmodification is for the purposes of explanation and illustration, andthat the many modifications coming within the spirit of my invention areintended to window portions composed of transparent Celluloid, a spacingstrip joining said window portions along one side, transparent celluloid4attaching portions joined to the inner faces of 'said window portionsalong the opposite side thereof and provided with a glue adherentsubstance.

2. A tab, comprising substantially parallel window portions composed ofCelluloid and joined at one side, and Celluloid attaching portionsjoined to the inner faces of said window portions along the oppositeside thereof and provided with a glue adherent substance, the joiningedge of one of said attaching portions being turned over to form a stop.

3. A tab, Comprising substantially parallel sides, and separateattaching portions joined to the inner faces of said sides, one of saidportions being turned over to form a stop.

4. A tab, comprising a Celluloid window portion, and a Celluloidattaching portion secured to the inner face of said window portion, saidattaching portion having its upper edge turned over to form a stop.

5. A tab havinga Celluloid attaching portion yCoated with a glueadherent,y gelatine, and a Coating of remoistening glue covering saidgelatine.

Celluloid with a Celluloid solvent and a glue adherent gelatine, dryingsaid Celluloid, and applying thereto a remoistening glue.

7 The method of forming a tab, -which comprises assembling strips `ofCelluloid in spaced parallel relation, uniting Corresponding edges ofsaid strips to form one end of the tab, coating the inner faces of saidstrips with a solution Containing a Celluloid solvent and aglue-adherent gelatin, and coating said gelatin with a remoisteningglue.

In testimony whereof I have hereunto subscribed my name.

Y vGROVER C. PERRY.

be- Covered by the appended claims. For

example, the .term Celluloid as used in the specification and claims isintended to cover the product known as Celluloid and otherl plasticsubstances of like Character.

claim: f 1. A tab, comprising substantially parallel 6. The method whichcomprises coating-

